<template>
  <view>
    <my-search @click="gotoSearch"></my-search>
    <view class="scoll-view-container">
      <!--左侧-->
      <scroll-view class="left-scroll" scroll-y="true"  :style="{height:wh+'px'}" >
        <block  v-for="(item,index) in cateList" :key="index" >
        <view :class="['left-item',index === activeIndex ?'active':'']" @click="cateClick(item,index)">{{item.cat_name}}</view>
        </block>
      </scroll-view>
       <!--右侧-->
       <scroll-view scroll-y="true" :style="{height:wh+'px'}" :scroll-top="scrollTop">
         <view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
          <view class="cate-lv2-tit">
            /{{item2.cat_name}}/
          </view>
          <view class="cate-lv2-list">
            <view v-for="(item3,index3) in item2.children" :key="index3" class="cate-lv2-item" @click="gotoGoodsList(item3)">
              <image :src="item3.cat_icon.replace('dev','web')"></image>
              <text>{{item3.cat_name}}</text>
            </view>
          </view>
         </view>
       </scroll-view>
    </view>
  </view>
</template>

<script>
 import badgeMix from '@/mixins/tabbar-badge.js'
  export default {
    mixins:[badgeMix],
    data() {
      return {
        //屏幕可用高度
        wh:0,
        cateList:[],
        activeIndex:0,
        //二级分类
        cateLevel2:[],
        scrollTop:0
      };
    },
    onLoad(){
      const sysinfo = uni.getSystemInfoSync()
      this.wh = sysinfo.windowHeight-50
      this.getCateList()
    },
    methods:{
      async getCateList(){
        // 3.1 发起请求
      const { data: res } = await uni.$http.get('/api/public/v1/categories')
        // 3.2 请求失败
      if (res.meta.status !== 200) return uni.$showMsg()
      // 3.3 请求成功，为 data 中的数据赋值
      this.cateList = res.message
      this.cateLevel2 = res.message[0].children
      },
      cateClick(item,index){
        this.activeIndex = index
        this.cateLevel2 = this.cateList[index].children;
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
        })
      },
      gotoSearch(){
        console.log('ok')
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
  } 
</script>

<style lang="scss">
.scoll-view-container{
  display: flex;
  .left-scroll{
    width: 120px;
    .left-item{
      background-color: #f7f7f7;
      line-height: 60px;
      text-align: center;
      font-size: 12px;
      
      &.active{
        background-color: #ffff;
        position: relative;
      &::before{
        content: '';
        display: block;
        width: 3px;
        height:30px ;
        background-color: #166beb;
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
      }
      }
      
    }
  }
  .cate-lv2-tit {
    font-size: 12px;
    font-weight: bold;
    text-align: center;
    padding: 15px 0;
  }
  .cate-lv2-list{
    display: flex;
    flex-wrap: wrap;
    .cate-lv2-item{
      width: 33.33%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      margin-bottom: 10px;
      image{
        width: 60px;
        height: 60px;
      }
      text{
        font-size: 12px;
      }
    }
  }
}
</style>
